Employers should only pick those recruits who understand programming jokes 🤔

Two SQL developers walk into a bar.

They immediately turn around and leave because they couldn't find a table.

I think you are confused, a recruiter does not need to know the tech to find people that know the tech.

They only need to read the Wikipedia page of that said tech and be not stupid.

A good recruiter will research and learn, a bad one will just try to get the job done.

Same applies to a developer or any other field.